Officers said when they arrived at the scene, a woman told them she was entering her apartment foyer when a man approached her from behind and indecently assaulted her.

She told police the man then fled the scene on foot toward Commercial Street.

Marcela Molina said she's on the alert in the North End once again.

"It's troubling," she said. "As a female living in the city, in this community, you never want to hear these things."

The attacker was described as a white male in his 30s and stood between 5 feet 10 inches tall and 6 feet tall and weighed about 200 pounds with short brown or light brown hair and was wearing a dark, three-quarter length coat with a zipper and dark jeans.

On Feb. 15, a woman said she was attacked in the area of Salem and Sheafe streets by a man who pushed her into the front foyer of her home before he assaulted her and took a photograph of her with his phone and fled the scene.

Last week, police arrested and charged 26-year-old Ross Currier in connection to that assault. He's an accountant for the Boston Beer Company and claims he's innocent. He said he was at home the night of that attack and three weeks ago the victim had also ID'd a different man.

Police would not say if the two assaults were connected to each other, and said that both incidents are still under investigation.

Police also said they checked on Currier's whereabouts Sunday night and said they have been in contact with the Department of Probation to review transmissions from his GPS bracelet and don't suggest any connection so far to Sunday's attack.

That leaves another suspect on the loose.

Anyone with information about the incident is asked to call police immediately.